Grant Gustin Dressed Up As The Flash For Halloween - On 'The Flash' Set!

Stephen Amell walks alongside Grant Gustin while filming new scenes on the set of the The Flash and Arrow crossover episode in Vancouver, Canada on Friday (October 30).

“My last scene on the #Flash / #Arrow crossover ended like I thought it would: With me & @grantgust spooning,” Stephen, 35, joked on Twitter after they wrapped.

Ciara Renee, who will star as Hawkgirl in the upcoming DC’s Legends of Tomorrow, was also spotted on the set. Can’t wait to see the new crossover!

Later that day, Grant got on his costume for Halloween — and it was The Flash!

“Got to shoot a one on one scene with @cavanaghtom today for the first time in a while. Called for a photo,” Grant captioned.

Tom Cavanagh came back with another one: “#Cutbacks.”

10+ pictures inside of Grant Gustin, Stephen Amell and Ciara Renee on set…